Tire vulcanizing bag



Oct. 5, 1943. Q J, WARMAN 2,331,087

TIRE vULcANIzING BAG Filed July 3, 1942 2 Sheets-Sheet 1 Oct. 5, 1943. o. J. wARMAN TIRE VULCANIZING BAG Filed July 3, 1942 2 Sheets-Sheet 2 lll/flll GMMMWS Patented Oct. 5, 1943 UNITED STATES PA'IEN'l", OFFICE n TIRE vULCANI'znG BAGn "om .I fwa'rman, Pmkiliafoalif. 'Application July a? 1942, serial No; 449,639 i v 'I v (cris-.45p Y y' ,"11 Claims.

This invention relates generally vto tire repair and vulcanizing devices and" pertains particularly to improvements in the core 'units disposed within the tire casing for the application of-'heatrto the portion to be v lcani'zed'; 'Y f A principal object of the pre'sentinventionis to provide an Airripro'ved vsteam 'bag or rcoreunitl employing a novel 4rubber sleeve carriedrupon'a supporting frame and coupledl thereto in4 a novel manner, such sleeve being designed to house'tlfe heating fluid in a manner rto readily transmitf'the heat to the desired area of the tire casing to-effect the desired vulcanizing action in thequickest and most economical manner.

'Another object of the invention is toprovide a vulcanizing steam bag designed in such a manner as to require the use 'of a' minimum of rubber for its proper construction and having internally ribbed ends to facilitate'the attachment thereto of rigid end closure walls which form a part of the supporting structure upon which 'the bag is mounted.

Another object of the invention is to provide a vulcanizing 'bag orsleevefstructure having `a bead rib'withfwhich is detachably coupled abead plate which is -rigidly-"`connected with the supporting frame for the `bag` or sleeve, the said bead plate being' replaceable by plates of different sizes andthe bead' o f the sleeve functioning to facilitate the vplacement-of such-bead plate in'the proper Working positionin a minimum-'ofV time and with a rninirnumyo effort. l'

The invention 'will be best understood from a consideration of thefollowing detailed descriptiontaken in connection with the accompanying drawings, it being understood, however, that the invention is not to be considered as limited by the specic illustrationand description but that such illustration and description constitutes a preferred embodiment of the invention. In the drawingsf l y FigureI 1 is a View in longitudinalsection of one embodimentof the present invention `wherein the rubber sleeve ofthe 'vulcanizingbag directly receives the heating fluid and is supported'upon a skeletontype frame. Y

Figure '2 is a sectional view on the line 2"-2 of Figure V1 and upon an enlarged scale.

Figure' 3 is a sectional view on the une 3 3l of Figure l, on an enlargedscale. f

Figure 4 is a fragmentary View showing/the bead plate clamp. A

Figure 5fisy a View inplanofthe'beadplate perse. f

Figure v6 isa longitudinal sectional view of anothenembodiment of ftheinvention,y which embodiment isvdesigned for use upon the heavy duty tireswherehigh pressures are"used in the vuleanizing operation. Y

embodiment shown in Figure 6.

liigure"8"'is a"transverse section taken on the une e-sefirigure-6.

Referring now more'particularly ing'sthe'rrubber sleeveof the embodiment ofv th'efpres'ent vulcanizing bagjor unit shown in Figures '1: "to '4 inclusive'is indicated generally by th'e'nu'rneral Iil and the supporting frame struc-1 ture for thissleeve isf generally identied bythe reference character II;

The frame structure' II Iv 'comprises' a single an encircling channel I1, the purpose of Which will be hereinafter described.Y

At the inner endl 'of the threadedportion I3 ateach end of the bar I2 there is securedthe collar I8 which may be inthe form of a nut' threaded onto the bar and Welded thereto or it may be initiallyforrned With the. bar as an integral part thereof. Thek threaded portionof the bar is designed to extend through the bossed opening fI 5 of an end plate rin the manner shown and there/is interposed between the inner end edge of theend plate opening and the xedcollar' I3, a fluid `tight gasket I9 of copper or other suitable material. After the' end plates I4 vhave andthe sleeve is vthen Vdrawn over the frame' so' that the tivo ends will be closed by theend platesV I4." l'lh'ere'E are then placed around the end plates upon the'V outer fside of thesaid sleeve the clamps 23,"th'e ends of which are brought into spaced relation as indicated at. 24 and coupled together "Figure 7 is a vieWin'end elevation offtlier to the draw-V` been placed in position upon theend of the bar I2 a,securingv has a threaded fluid admis-I o by the bolt 25 as shown in Figure 3. This clamp is closed so as to lightly press the sleeve against the rubber material in the channel or groove of the adjacent end plate and the unit is then placed in a suitable vulcanizing kettle and is subjected to a vulcanizing operation so as to cause the live rubber in the grooves to be vulcanized to the inner wall of the sleeve thereby forming upon such inner wall and adjacent each end of the sleeve therib 26.

In a similar manner the bead rib 2T is formed along the inner or concave side of the arcuate sleeve by the employment of the channeled bead.

plate 28.

proper position against the inner or concave side of the sleeve as shown in Figure 1. Adjacent each end the bead plate is cut out asindicatedt at 3B to receive the ends 24 and the securing bolts 25 of the adjacent clamp 23. The top face of the beady plate adjacent the cut out-:S'mayalso be'transversely recessed as indicated at 3|A to receive. the. clamp Yband ad-jacent each of itsrends.V4

The bead plate is maintained in position against the sleeve by the clampplate's 32, .each -of which positions against an endof the bead -plate 28'where it is secured by Kthetap screws. 33, and has an inwardly curved top edgeportion 34. which hooksover the outer edge-ofthe rim Hil ofthe adjacent plate I4 as shown in Figure l. After the bead plate. has beensecured in position'in the mannerstated so as to-pressth'e soft rubber' contained in the channel. 29 againstfthe Wall 4of the-sleeve, the unit is placed-in' a vulcanizing ket' tle and suitably heated to efectvulcanizationfof. the rubber rib 2l: to the wallof thersleeve.-k

The bead plate 28fis.designed to'fillainthe area between the beads of thetire casing: and-byproviding several different bead: plates of-'di-fferent widths but eachY having: va channel of theA sanre-l widthfto receive the rubber rib- 2l' ofthe sleeve,

itlwilrbe'apparent that thewbagcorA unit maybe.

employed .in tires of,difierent'sizes.-'-

In the use'of'tliexbag shown im Figure 1 the same is. placed1zin the tire-casingto cover thearea to be vulcanized;and .thezcasing `is. then placedv iwithn 4a suitable outer; jacket. in which itis rmly clamped in the: customary :.manner..

or embodiment of the invention comprises .the

arcuate metal tube 3'! which is" encased within the sleeve 35 in themarmer..illustrated.l .At each end thistube 31'is exteriorly reduced in diameter to form an encircling channel *38? and 'intermediate its endl and' upon the convex side the'metal tuberis provided, preferably adjacent each end, with a threaded port"3 9finY which is connected one end` of a pipe40`which extends through the adjacent end of. the'tube.: Uponthe inner or concave side of the tube..there -are Yprovided the threaded openings 4L for-the: purpose -hcrein' after described.

The channel 29 of this plate is filled with live rubber and the plate is disposed Sin. u

Each end of the metallic tube 37 is closed by a plate 42 which is secured to the adjacent end of the tube by screws 43. Each of these plates is provided with a suitable opening 44 for the passage therethrough of the adjacent pipe 40 and .Itlwiill benoted that each end wall or plate 42 is of a diameter equal to the major diameter of the tube 31'and thus a portion of the periphery of eaclrplateextends beyond the bottom of the rcduced portion 33 to form one side of this re- 'duced 'portion or channel.

In constructing the heavy duty unit the channel :38 at'each .end ofthe tube is lled with live rubber and-the vsleeve 35 isY placed onv the tube in fthermanner shown and the whole unit is then placed in a vulcanizing kettle and subjected-to thenecessary heat to vulcanize the rubber in the channels-.to the inside: of the tube thus forming upon :the inner -sideof each tube the rib Gl which corresponds'with the rib 25 upon the inner side of thetube I0.

In '-orderv to maintain -the proper contact pressure between the rubber in each channel 38 and the sleeve 35 there is placed around each end of the sleeve to surround the adjacent channel, the splitlclamp-ring. l43, the two ends 49 of which are drawn together by the`r boli; 56. After the vulcanizationY of the rib to the sleeve has been completed these clamps may be drawn more tightly around the sleeve to establish a leal: tight joint between the sleeve and tube.

The-inner or concave side of the sleeve 35 has formed therealong the rubber bead rib 5i an-d-ths encased in the elongated arcuate bead platef52,tting :inthe channel 53. This rib is formed inthe same'manner as the rib 2'i in that the channelr53 ot the bead plateis initially lilled with .rlive rubberand is placed in position against the concave inner side of the sleeve where it is held bythe stud 'bolts 54 which are extended through lsuitable apertures inthe bead plate and engagein thethreaded aperture 4| of the tube 3'?. The unit is then subjected to vulcanizing heat to effectthe desiredr unionof the rib rubber 5l and the' sleeve35'after which the bead plates 52 may -beremoved.to be replaced by one of greater or lessfwidth but having a channel of the same size soasto snuglyv receive the rib 5l. Thus the bag may be. used-.in the vulcanization of tires of different sizes- In orden that the-sleeve 35 may be conveniently placed in position upon and removed from the tube31; the sleeve and the rib 5I are split; lengthwise and 'the securing bolts or screws 54 are extended -through thel division.

The tubef-orcoreLSI may be of aluminum or any other suitable metal and in the use of this embodiment ofthe invention; after the bag has been placed in'athe tire and the. necessary jacket has been placed around the outside 'of the tire, water is pumped through one of the pipes 4l! between thetsleeve 35y and the core or tube, the other pipe 40 being closed during thisoperation by suitable valvesor in any other desired manner. This water pressure may be built up to about one'hundred and'twenty ve pounds. The

water between the sleeve and core is then heated in a suitable manner as by the introduction of live steam thru one of the pipes 46 to the interior of the core or by the use. of electric resistance heater means, which may 'be housed inthe core and be supplied byvwires passing through one of the openings 45. The temperature of the Water between the sleeve and core is raised to about three hundred degrees and the pressure of the Water will be increased slightly or to about one hundred and thirty iive pounds at this Atemperature.

From the foregoing it will be readily apparent that the general features of construction of the two vulcanizing bags are alike in that each bag comprises a sleeve having internal ribs at the ends which function to maintain thesefsleeves in position upon a supporting frame, the frame in one case comprising an arcuate bar with grooved..

or channeled plates at the ends and in the other case a tubular arcuate core having a plate aty the lwith an elongated arcuate rigid bead vplate extending lengthwise of the concave side of the sleeve, and means connecting the bead plate with the frame.

3. A vulcanizing bag as set forth in claim 1 including a rib formed integrally with and extending lengthwise of the concave side of said sleeve, a channeled bead plate formed to receive said rib in the channel thereof and extending the length of the rib, and means detachably coupling said bead plate with theframe.

4. A vulcanizing bag comprising an arcuate sleeve of a single thickness of material, cut square across at each end and having an annular rib upon the inner surface thereof adjacent each end, a frame designed to be positioned within and support said sleeve and having an annular channel at each end in which the adjacent annular rib fits, a clamp encircling each end of the sleeve around and securing the adjacent rib in its channel, an elongated, arcuate, rigid bead plate disposedl against and extending throughout the major part of the length of thersleeve upon the concave side thereof, means securing said bead plate to the frame, and means for introducing uid into the sleeve between the same and the frame.

5. A vulcanizing bag as set forth in claim 4, including a rib formed integrally with the sleeve lengthwise thereof and upon the concave side, the said bead plate being channeled upon its convex side to receive the last mentioned rib, and the said securing means for the bead plate being removable for facilitating the separation of the bead plate from the unit. y

6. A vulcanizing bag as set forth in claim 4 in which said frame comprises an arcuate bar ex,-V

securedto each end of the bar and disposed within the adjacent end of the sleeve, the said channel means being formed in the periphery of each plate. 5

7. A vulcanizing bag as set forth in claim 4 in which said frame comprises a tubular core fitting snugly Within the sleeve and a plate removably secured to and closing each end of the'core,

said core at each end .being exteriorly reduced in l diameter to form withv the adjacent plate the stated channel means for the sleeve internal rib.

8. A vulcanizing bag of the character described vcomprising'a tubular rubber sleeve, an annular rib formed upon the inner'side of the sleeve at each end, a rigid arcuate bar extending longitudinally through the sleeve and screw threaded at each end, a stop collar at each end of the bar at the inner end of the screw threads, a circular plate within each en d of the sleeve and of a diameter substantially the same as the inside of the sleeve and having a central aperture designed to receive the threaded end of .said bar each end of the bar having la plate mounted thereon, a securing nut upon each end of the bar maintaining the adjacent plate inA position againstthe adjacent collar, each plate having a channel formed around its periphery to'receive the adjacent annular rib, a clamp band encircling each end of the sleeve in the plane of a rib and end plate, and means for introducing fiuid into and removing fluid from the sleeve.

9. A vulcanizing bag as set forth'in claim' 8 including a rib formed integral with and extending through the major portion of the length `of the sleeve upon the concave side thereof, an arcuate rigid bead plate extending lengthwise of the concave side of the sleeve and having a channel in its convex side to receive the last mentioned rib, and means detachablycoupling the ends of the bead plate with said circular plates. l0. A vulcanizing bag comprising an arcuate, tubular rubber sleeve having an annular rib upon the inner side and adjacent each end, an arcuate tubular core having a portion `of each en d reduced in external diameter to provide a channel for the reception of an annular rib, a plate removably secured across each end of said ycore and having a portion extending across and forrning one side of said channel, a clamp band en the concave side thereof, the sleeve and external rib being longitudinally divided, an arcuate rigid bead plate disposed lengthwise of the concave side of the sleeve and having a channel in its con# vex side for the reception of said external rib,

and securing elements connected with said bead plate and extending from the same .through the external rib and the sleeve for connectionV with said core. 1

ORA J.` WARMAN.

tending through the sleeve and a plate removably 

